Ice House in the Scottish Highlands

Ice houses or icehouses are buildings used to store ice throughout the year, commonly used prior to the invention of the refrigerator. Some were underground chambers, usually man-made, close to natural sources of winter ice such as freshwater lakes, but many were buildings with various types of insulation.

During the winter, ice and snow would be taken into the ice house and packed with insulation, often straw or sawdust. It would remain frozen for many months, often until the following winter, and could be used as a source of ice during summer months. The main application of the ice was the storage of perishable foods, but it could also be used simply to cool drinks, or allow ice-cream and sorbet desserts to be prepared.

Bruce Walker, an expert on Scottish Vernacular buildings, has suggested that the relatively numerous and usually long ruined ice houses on country estates have led to Scotland's many legends of secret tunnels.